Entropy - learning decision trees, Computer Engineering

Assignment Help:

Entropy - learning decision trees:

Through putting together a decision of tree is all a matter of choosing that attribute to test at each node in the tree. Further we shall define a measure that is information gain that will be used to decide which attribute to test at each node. By considering through information gain is itself calculated utilising a measure called entropy that we first define for the case of a binary decision problem so then define for the general case. 

As per given a binary categorisation like C, and a set of examples, S, that are utilising the proportion of examples categorised as positive by C is p+  or the proportion of examples categorised  like negative by C is p-, then the entropy of S is as: 

641_Entropy - learning decision trees.png

Now next here instantly we defined entropy first for a binary decision problem is easier to get an impression of what it is trying to calculate. As Tom Mitchell puts this quite well: like 

"In order to define an information gain precisely so we begin by defining a measure commonly utilising in information theory that is called entropy in which characterizes the (im)purity of as an arbitrary collection of examples."


Related Discussions:- Entropy - learning decision trees

Example to show a single digit, Q. Example to show a single digit ? Dis...

Q. Example to show a single digit ? Displaying a single digit (0 to 9) Presume that a value 5 is stored in BL register then to output BL as ASCII value add character ‘0' to

Programs, A palindrome is a string that reads the same from both the ends. ...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Explain about the term intranet in brief, Explain about the term Intranet i...

Explain about the term Intranet in brief. Intranet: An Intranet is a form of information system which facilitates communication into the organizations in between widely

Explain about decimal numbers, Q. Explain about Decimal Numbers? Deci...

Q. Explain about Decimal Numbers? Decimal number system has 10 digits signified by 0,1,2,3,4,5,6,7,8 and 9. Any decimal number can be signified as a string of these digits an

Make a generalized program that accepts a number and base, Q. Make a gener...

Q. Make a generalized program that accepts a number & base, convert it into the given base. Perform necessary validations.

What is glitch and what are causes of it, What is glitch? What causes this ...

What is glitch? What causes this (describe with waveform)? How to overcome this? The gated clock‘s corresponding timing diagram demonstrates that it implementation can lead to

Explain a multiprocessing operating system, Explain a multiprocessing opera...

Explain a multiprocessing operating system? A multiprocessing system is a computer hardware configuration which contains more than one independent processing unit. Multiprocess

Decimal equivalent of hex number 1A53, What is the decimal equivalent of he...

What is the decimal equivalent of hex number 1A53 ? Ans. 6739 is the decimal equivalent of Hex Number 1A53. From Hex Number to Decimal Number conversion is shown below: 1

State the concept of hierarchy in object oriented, Hierarchy Hierarchy...

Hierarchy Hierarchy is a process of ranking or ordering of abstraction. Hierarchy is decided by the help of 'divide and conquer' principle. Complex objects can be described

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd